Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the right order to form a meaningful and coherent paragraph.
A. Humans work because they have to; they play because they want to.
B. The most useful definitions are those that clarify the relationship of sports to play, games and contests.
C. “Play,” wrote the German theorist Carl Diem, “is purposeless activity, for its own sake, the opposite of work.”
D. Sports are part of every culture, past and present, but each culture has its own definition of sports.